CAPE CANAVERAL, Fla. -- A faulty valve switch and threatening thunderclouds forced NASA yesterday to postpone the liftoff of the shuttle Atlantis again, this time for 24 hours.
More equipment trouble struck last night. The latest problem hit electronics gear in the crew cabin.
Launch is now set for 11:02 this morning, although controllers can send Atlantis on its way as late as 3:06 p.m., or about five hours after the astronauts board the shuttle, whichever comes first.
The electrical problem could further delay the launch, they said.
"It could very well go either way," said Karl Kristofferson, NASA spokesman.
NASA had to decide whether to proceed with the late morning launch by the start of fueling at 2:42 a.m.
Air Force weather forecasters predict a 70 percent chance of acceptable weather at 11:02 and an 80 percent chance by 3:06.